Authorities announced a $50,000 reward Wednesday as they renewed their search for an elusive serial killer they say committed at least 12 homicides, 45 rapes and dozens of burglaries across California in the 1970s and 1980s. The case has grown cold for the killer known by at least four nicknames over the decades. He was dubbed the East Area Rapist after his start in Northern California. The Original Night Stalker after a series of Southern California slayings. The Diamond Knot Killer for using the elaborate knot to bind two of his victims. And most recently the Golden State Killer.